Feature #1624

Updated by pospelov almost 4 years ago

Some values are not registered yet in the domain, like particle density, abundance, ...
Complete the list of possible parameters that can be used in fitting and make sure they are accessible from the GUI fitting machinery.

List of GUI properties which we could fit if they would exist on domain side
* ParticleItem::P_ABUNDANCE
* ParticleLayoutItem::P_TOTAL_DENSITY
* InterferenceFunctionRadialParaCrystalItem::P_PDF
* InterferenceFunction2DParaCrystalItem::P_PDF1(2)